Remote input/output device

Abstract

A remote input/output device ( 1 ) has a plurality of connectors (CN) to be connected to input/output equipments ( 12 ) and is capable of performing transmission and reception, between the remote input/output device and a program controller ( 3 ) of the input/output equipments ( 12 ), of the input/output data to and from the input/output equipments ( 12 ), wherein it is arranged that two input/output points can be connected to each connector (CN), and that each input/output point is switchable between input and output points by an internal jumper switch. According to this arrangement, input/output points can be freely switched between input and output according to the number of input and output points. Thus, a single remote input/output device can serve for a necessary number of input/output points, allowing it to keep the man-hours of work and equipments-purchasing cost from increasing.

What is claimed is:  
     
         1 . A remote input/output device having a plurality of input/output points to be connected to input/output equipments, and performing transmission and reception, between the remote input/output device and a control device, of input/output data to and from each of said input/output equipments, wherein 
 each of the input/output points is switchable between the input point and the output point.    
     
     
         2 . The remote input/output device as set forth in  claim 1 , wherein at least two kinds of common power supplies for feeding power to the input/output equipments can be selected.  
     
     
         3 . The remote input/output device as set forth in  claim 1 , wherein connection to the input/output equipments is effected by connectors.  
     
     
         4 . A remote input/output device having a plurality of input/output points to be connected to input/output equipments, and performing transmission and reception, between the remote input/output device and a control device, of input/output data to and from the input/output equipments, wherein 
 the remote input/output device comprises: 
 a communication board capable of transmitting and receiving, between the communication board and the control device, the input/output data in a mixed state; and  
 a connector board to which the input/output equipments are connected,  
 said communication board being provided with an input section for inputting input data from the connector board and an output section for outputting output data to the connector board,  
 said connector board is provided with switches, respectively for said input/output points, for connecting the input/output point to one of the input section and the output section of the communication board.  
   
     
     
         5 . The remote input/output device as set forth in  claim 4 , wherein the connector board is provided with switches respectively for selecting one from a plurality of common power supplies and feeding power therefrom to the input/output equipments.